Permanent binding post



July 16, 1940.

W. PITT PERMANENT BINDING POST Filed May 24, 1959 Patented July 16, 1940UNITED STATES I 2,208,196 PERMANENT BINDING POST William Pitt,Elizabeth, N. J assignor to Wilson- Jones Company, Chicago, 111., acorporation of Massachusetts Application May 24, 1939, Serial No.275,378

3 Claims. (01. 85---4) This invention relates to a permanent bindingpost particularly adapted for use in connection with loose leaf binders.

It is an object of this'invention to provide a simple and eificientmeans for permanently binding a plurality of loose sheets.' Otherobjects of this invention will become apparent upon reading thefollowing description, taken in conjunction with the accompanyingdrawing, in which Figure 1 shows one embodiment of the invention, partlyin elevation and partly in section,

with the post-members ready'to be teleseoped.

together;

Figure 2 is a view similar to Figure 1 with the post members telescoped;

Figure 3 is a view similar to Figure 1 showing another embodiment of theinvention;

Figure 4 shows the embodiment of Figure 3 o with the post memberstelescoped.

In the drawing, the reference numeral 2 indicates a female post memberinto which a male post member 3 is adapted to be telescoped. Both postmembers are provided with suitable heads 4 and 5 adapted to bear againstsheets impaled on the post. A stiff resilient wire 6 is rigidly securedto the male post member 3 and projects beyond the end of the member 3which is adapted to enter the open end of the female post member 2. Thepreferred manner of securing the I wire to the member 3 is to provide alongitudinal groove along the outer surface of the member. The wire ispositioned in the groove and the sides of the groove are then peenedover the wire to hold it securely. The wire 6 is bent at an acute angle1 so that its free end 8 is positioned outside the area defined by thecross section of the male post member 3 at a point between the bend 1and the entering end of the post member 3. The end 8 is cut so as toprovide a sharp surface. The wire 6 is sufficiently resilient so thatwhen the post sections are telescoped the bent end will freely enterthetubular portion of the female post member. The sharp edge of the end8 will bite into the wall of the female post member to prevent movementof the post members in the opposite direction.

The embodiment of the invention shown in Figures 3 and 4functions in thesame manner as that described in connection with Figures 1 and 2, anddiffers therefrom only in the shape of the wire and the manner ofsecuring it to the post. In this embodiment the entering end of the malepost member 3' is slotted across the diameter to provide an inclinedsurface 9 upon which a stiff resilient wire [0 is positioned. A

longitudinal groove ll provided in the circum- .3

ferential surface of the member 3 extends from the end of the inclinedsurface 9 towards the headed end of the member 3'.to provide thenecessary clearance for the free end I2 of the wire it. After the wireI0 is properly positioned the 10 ends of the male post member 3' arepressed together, as indicated at l3- to hold the wire In securely. Asin the previously described embodiment the resilience of the wire illwill' permit telescoping movement of the post sections and the sharp endof the wire willprevent movement in the opposite direction.

Although I have described two embodiments of my invention in detail, itwill be understood that the description thereof is illustrative, ratherthan restrictive, as many details may be modified or changed withoutdeparting from the spirit or scope of the invention. Accordingly, I donot desire to berestricted to the exact details of constructiondescribed, except as limited by the appended claims.

I claim: e

1. In a permanent binding post comprising a male section and a femalesection adapted to telescope together, a resilient wire secured lon- 30gitudinally to said male section and projecting beyond the end thereof,the projecting portion of said wire being bent at an acute angle wherebyits end is positioned outside the area defined by the cross section ofsaid male section. 35

2. In a permanent binding post, amale sec tion, a longitudinallyextending groove in said male section, and awire secured in said grooveand projecting beyond the end of said male section, said wire being bentso as to position its free end outside the area defined by the crosssection of said male section at a point between said bend and the end ofsaid male section.

3. A permanent binding post comprising a male and a female memberadapted to telescope together, and a resilient wire projecting from the

